Flattening-oven furnace



H. F. CLARK. FLATTENINGOVEN FURNACE. APPLICATION FILED MAY 1, I918.RENEWED OCT. 9,1920.

Patented May 17, HEETS-SH EE H. F, CLARK.

FLATTENING OVEN FURNACE. .APPLICATION FILED. MAY 7, 1918. RENEWED OCT.9, 19.20.

1,878,657. P tented May 17, 1921.

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HENRY I CLARK, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WINDOW GLASSMACHINE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OE NEWJERSEY.

FLATTENING-OVEN FURNACE.

Patented May 17, 1921.

Application filed. May 7, 1918, Serial No. 233,905. Renewed October9,1920. ,Serial No. 415,949.

To all whom it may concern:

Be it known that I, HENRY F. CLARK, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Flatte-ning-Oven Furnaces, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, formingpart of this specification, in which Figure 1 is a sectional plan viewof a flattening-oven and furnace embodying my invention, and

Figs. 2 and 3 are sections taken on the lines TT--II and TIL-III,respectively, of Fig. 1.

Figs. 4c and 5 are sectional views showing a modification.

My invention has relation to improvements in flattening-oven furnaces,and more particularly to gas-fired furnaces of this character. Myinvention is designed to provide means whereby a more perfect combustionmay be obtained and the efficiency of the furnace greatly increased. Myinvention also provides means whereby the furnace, although regularlyadapted to operate with producer gas, may, without interruption, be madeto operate on natural or other gas, or upon fuel oil.

The nature of my invention will be best understood by reference to theaccompanydrawing in which I have shown a preferred embodiment thereof,it being premised, however, that various changes can be made in thedetails of construction, arrangement and combination of the partswithout departing from the spirit and scope of my invention, as definedin the appended claims.

.l'n these drawings, the numeral 2 designates the usual rotaryflattening table, 3 the flattening stones thereon, 4 the shove-inopening for the cylinders to be flattened and 5 the outlet passageleading to the annealing leer. These parts, together with the generalconstruction of the oven, may be of any usual or suitable construction.7

6 designates a gas main leadin from a gas producer and having the brane7 which supplies the flattening oven, this branch having the port 8controlled by a suitable valve 9. The flue 7 has an outlet opening 10which leads into the nozzle shaped re fractory member 11. This member,in turn, discharges into the mixing and initial combustion chamber 12,the latter extending upwardly on one side of the shove-in passage t andthence laterally above said passage and into the flattening oven proper.

The nozzle mem er 11 extends vertically through an air chamber 13 whichis provided with a suitable air inlet, such as shown at it; andterminates within an opening 15 in the floor of the chamber 12; saidopening being of sufficiently larger diameterthan the nozzle to providea surrounding air passage.

with any suitable regulating damper or valve. In the construction shown,this opening leads from a vestibule 16 having an air The air inletopening 14 may be provided inlet opening at one side, which is 0011-producer supplying the main 6w This additional gas supply may be naturalwhere that is available, or fuel oil may be employed in these burners.

The operation will be readily understood. The producer gas is dischargedinto the mixing and primary combustion chamber 12 through the nozzle 11,the latter having an injector action whereby air is drawn into thechamber 12 through the opening 15. The result is that a proper amount ofair is supplied and becomes thoroughly mixed with the as in passingthrough the mixing and primary combustion chamber.

If, for any reason, the supply of, producer gas should vary at any time,gas may be turned on at the burner pipes 18 and the latter used for thecontinued operation of the furnace, thereby avoiding interruptions orshut-downs until such time as the supply of producer gas again becomesavailable.

The actual commercial operation of flattoning-ovens embodying myinvention has demonstrated the greatly improved character of thecombustion obtained and the use of the invention has been found togreatly increase the efliciency ovens.

It will be readily understood that as many of the nozzle members 11 maybe used as ma be desired in any particular case.

g1 Figs. 4 and 5 I have shown a modification in which an air-supplynozzle 11 is placed within the gas nozzle 11, so that a portion of airfor combustion is drawn in through said nozzle 11 and another portionthrough the opening 15 If desired, however, all the air may be suppliedthrough the inner nozzle.

I claim 1. A glass flattening oven having a flattening chamber, ashove-in opening at one side of such chamber, a combustion chamber atthe outer side of the shove-in opening, an air chamber below the floorof the combustion chamber, a gas chamber or passage below the floor ofthe air chamber, the floors of the combustion and air chambers havingvertically alined openings therein, and a tube extending verticallythrough the air cha iber and connecting the said openings, said tubehaving an upwardly converging interior passage, and there being a. spacearound that portion of said tube within the opening or the floor of thecombustion chamher through which air from the air chamber can pass intothe combustion chamber; substantially as described.

2. A glass flattening oven having a flattening chamber, a shove-inopening at one side of such chamber, a combustion chamber at the outerside of the shove-in opening, an air chamber below the floor of thecombustion chamber, a gas chamber or passage be low the floor oi the airchamber, the floors or" the combustion and air chambers havingvertically allned openings therein, and a tube extending verticallythrough the air chamber and connecting the said openings, said tubehaving an upwardly converging interior passage, and there being a spacearound that portion of said tube within the opening of the floor ot thecombustion chamber through which air from the air chamber can pass intothe combustion chamber, said tube having therein an air supply pipeprovided with means for the admission of air thereto; substantially asdescribed.

3. A glass flattening oven having a primary combustion chamber, a gassupply nozzle communicating with said chamber, and an auxiliary burneralso opening into said chamber at a point closely adjacent to the gassupply nozzle and which is connected to a different source of fuelsupply from that which feeds the said nozzle; substantially asdescribed.

4. A glass flattening oven having a mixing and primary combustionchamber at one side of the oven proper, a gas supply flue below saidchamber, an air chamber intermediate the gas supply flue and the primarycombustion chamber, and a nozzle member communicating with the flue andarranged to discharge into the mixing and primary combustion chamber,there being an air opening leading through the floor oi"- the combustionand mixing chamber, and a burner having another source of supply andalso arranged to discharge into said mixing and combustion chamber;substantially as described.

In testimony whereof Ihave hereunto set my hand.

HENRY F. CLARK.

